????????public?function?actionLogin()
????????{
????????????$user_login?=?new?LoginForm();?//LoginForm?是?YII自帶的一個文件?需要配置
????????????if(isset($_POST['LoginForm']))
????????????{
????????????????$user_login->attributes=$_POST['LoginForm'];?
????????????????if($user_login->validate()?&&?$user_login->login())?//validate?驗證??login?設置session
????????????????{
????????????????????$this->redirect('index.php');
????????????????}
????????????????
????????????}
????????????$this->render('login',array('user_login'=>$user_login));
????????}

LoginForm 文件

	public?function?authenticate($attribute,$params)
	{
		if(!$this->hasErrors())
		{
			$this->_identity=new?UserIdentity($this->username,$this->password);?//需要到?UserIdentity中配置
			if(!$this->_identity->authenticate())
				$this->addError('password','用戶名或密碼錯誤');
		}
	}

在 components 中 UserIdentity

	public?function?authenticate()
	{
????????????????$user_model?=?User::model()->find('username=:name',array(':name'=>$this->username));
????????????????
????????????????if($user_model?===?NULL)
????????????????????$this->errorCode=self::ERROR_USERNAME_INVALID;
????????????????elseif($user_model->password?!==?$this->password)
????????????????????$this->errorCode=self::ERROR_PASSWORD_INVALID;
????????????????else
????????????????????$this->errorCode=self::ERROR_NONE;
????????????????return?!$this->errorCode;
	}

下面 就 是簡單的了

	public?function?rules()
	{
		return?array(
			//?username?and?password?are?required
			array('username',?'required'?,'message'=>'用戶名必填'),
????????????????????????
????????????????????????array('password',?'required'?,'message'=>'密碼必填'),
			//?rememberMe?needs?to?be?a?boolean
			array('rememberMe',?'boolean'),
			//?password?needs?to?be?authenticated
			array('password',?'authenticate'),
		);
	}

	/**
	?*?Declares?attribute?labels.
	?*/
	public?function?attributeLabels()
	{
		return?array(
			'rememberMe'=>'記住我',
????????????????????????'username'=>'用戶名',
????????????????????????'password'=>'密碼',
		);
	}

	/**
	?*?Authenticates?the?password.
	?*?This?is?the?'authenticate'?validator?as?declared?in?rules().
	?*/
	public?function?authenticate($attribute,$params)
	{
		if(!$this->hasErrors())
		{
			$this->_identity=new?UserIdentity($this->username,$this->password);?//需要到?UserIdentity中配置
			if(!$this->_identity->authenticate())
				$this->addError('password','用戶名或密碼錯誤');
		}
	}